Antikamnia (derived from the Greek and meaning "opposed to pain") . Antikamnia Chemical Company (1890–1930), named after its patent medicine Antikamnia, was an American pharmaceutical company based in St. Louis that manufactured supposed cures for pains with the main ingredient being acetanilid, which was known to be toxic in high doses or in sensitive individuals. They produced a range of products with mixtures of therapeutic chemicals including both quinine and heroin.